The Blood Ball (Oct. 26)

The Blood Ball

Witches, vampires and ghouls are invited to a party for a cause at Spring Place in Tribeca for DKMS, an organization that works to recruit blood donors. This benefit will include dancing, cocktails and special performances, according to organizers. ($500, 8 p.m., 6 St. Johns Lane,

Hudson Scare bar crawl (Oct. 26)

Hudson Scare bar crawl

Try some of the city’s spookiest drinks during this Halloween bar crawl that will take you to nine different bars with creepy drinks made for the occasion, including Adoro Lei (pictured, Spooky Syrup), Arlo Hotel, Brooklyneer, Cafe Hugo, Lazy Point and others. ($10 plus $5 or $6 for each drink, 5:30 to 9 p.m., pick up your pass at Manhattan Mini Storage, 260 Spring St.,

Reality Bites Halloween Party (Oct. 27)

Reality Bites Halloween Party

The 1980s and ’90s are back for one night. Dress up and win a prize for your costume and don’t miss the treats — there will be 100 pounds of candy up for grabs. DJ Brian Blackout will spin tunes while horror movies are projected across the venue. ($7, 10:30 p.m., Littlefield, 635 Sackett St., Brooklyn,

Halloween at Dream Downtown (Oct. 28)

Halloween at Dream Downtown

Pick your Halloween party by theme at Dream Hotel, which is hosting three separately themed parties across its building. The Animal Party will be hosted by DJs Travis Wild and Roger Silver inside the Electric Room from 11 p.m. to 4 a.m.; Freak Show will take place on the PHD Rooftop Lounge with music by Mike Tully and Cam Smalls from 10 p.m. to 4 a.m.; and DJ Chuckie will spin tunes at the general Halloween bash in the Gallery from 9 p.m. to 4 a.m. (Admission starts at $50, Dream Downtown,

Freak Show Party at Sunday in Brooklyn (Oct. 31)

Be surrounded by “freak show” acts like fire-breathing, snake dancing, sword swallowing, stilt walking and acrobatics, and take part in activities like tarot card readings, face painting, a photo booth and dancing at this costume party. ($100, 8 p.m., Sunday in Brooklyn, 348 Wythe Ave.,

Circoloco Halloween (Oct. 27 – 28)

Circoloco Halloween

This Halloween dance party will feature internationally acclaimed house and techno artists such as Seth Troxler, the Martinex Brothers, Jamie Jones and Loco Dice, among others. ($69, 10 p.m., at an undisclosed location,

Friday Night Roxx (Oct. 27 – 28)

Sushi Roxx is getting festive with Halloween-themed show with a menu featuring “scary spicy tuna rolls,” “evil chicken tenders,” “haunted fries,” and S’mores. A special “witches brew” mocktail made with berries and gummy worms will be available as well. (6:15 p.m., 120 E. 39th Street,

The McKittrick Masquerade: ‘Inferno’ (Oct. 27, 28, 31)

The McKittrick Masquerade

Known for its long-running performance, “Sleep No More,” the McKittrick Hotel is bringing back its annual Halloween party, “The McKittrick Masquerade” in late October. This year’s event will be the hotel’s biggest masquerade with more floors and rooms of macabre experiences, according to organizers. Guests will have access to an open bar, live music and special performances. Those who attend should wear a costume inspired by the occult. (Oct. 27 – 28, at 7 p.m., 10:15 p.m. and 12:30 a.m., and Oct. 31 at 6 p.m., 9:15 p.m. and 12:30 a.m., tickets range from $75 to $485, 530 W. 27th St.,

‘Decked Out Sunset Scare Yacht Party’ (Oct. 28)

Decked Out Sunset Scare Yacht Party

See a New York City sunset aboard a “haunted” yacht. Every “terrifying” costume wearer will get free admission to an after party. ($25, must be 21 to attend, boarding starts at 8 p.m., sailing from 9 p.m. to midnight,

A ‘Harry Potter’ Theme Halloween Party (Oct. 31)

A 'Harry Potter' Theme Halloween Party

Your owl has arrived and it’s time to head to Hogwarts. A “Harry Potter”-themed Halloween party awaits. Be sure to dress in your house robes. Wands are optional, but no broomsticks allowed. A DJ will perform during the event. The party is for those 21 and older. (Tickets range from $10 to $350, 9 p.m. to 4 a.m., Level 3, 605 W. 48th St.,